Anti-Trump protesters have blockaded Uber headquarters

Protesters chained themselves to the front doors of Uber's offices in San Francisco as Donald Trump was inaugurated on Friday, San Francisco local media reported. Employees were reportedly unable to enter the building, which also houses payments company Square, through the front door.

An Uber spokeswoman told CNBC: "As a company we're committed to working with government on issues that affect riders, drivers and the cities where we operate. Just as we worked with the Obama Administration, we'll work with the Trump Administration, too."